Windows

Why Windows 2000 have multiple versions ? (professional,server,…)

:

The Reason for having different version is simply marketing :

This allows Microsoft to charge big companies more than they

Charge individuals for what is essentially the same product.

This idea is not new,however, and hardly unique to Microsoft.

For years , airlines having been charging business passengers much

More , not only for Business Classes but also for Cattle Class if

They want the luxury of buying the ticket a day before the flight

Instead of a month before the flight.

Technically , the way the version differences are maintained is

that a few places in the code , two variables are

Read from the registry , ProductType and Productsuite.

Depending on their values , slightly different code is executed.

Changing these variables is in violation of the license . in addition

The system traps any attempt to change them and records the attempt

At tampering in an indelible way so it can be detected later.

Modern Operating Systems

Andrew S. Tanenbaum